Barnes, Benedict, E.D J.O. Wusu-Ansah, S. K. Amponsah, and I.A. Adjei. “The Proofs of Triangle Inequality Using Binomial Inequalities”. European Journal of Pure and Applied Mathematics 11, no. 1 (February 14, 2018): 352–361. Accessed November 29, 2023. https://ejpam.com/index.php/ejpam/article/view/3165.